|View static image|
|Number of cells||38|
|Discovered by||Paul Callahan|
|Year of discovery||1998|
A Callahan G-to-H is a stable glider reflector and glider-to-Herschel converter discovered by Paul Callahan in November 1998. The initial stage converts two gliders into a Herschel. In the infobox pattern, a ghost Herschel marks the output location. The south-east glider deletes the extra beehive. The north-west eater 1 can be replaced with a toad to give slightly more clearance on that side.
The cleanup glider (to clean up the beehive) coming from the southeast can be supplied by an Fx77 + L112 + Fx77 Herschel track following the converter, which results in a recovery time of 575 ticks -- or by reflecting the output Herschel's FNG with various combinations of bumpers, bouncers, and Snarks, as in the p8 G-to-H, or adding a L156 and reflecting its spare glider. As a 2G-to-H, or if overclocking is used with appended conduits with a correctly timed output glider, it has a repeat time of 92 ticks.